Tifosi: The Tifosi Slice provides fantastic frameless optics with an organic, curved lens design, combined with the aggressive arms of the Alliant model for a dynamic look. The interface between the arm and the lens has been optimised in the Slice for super-fast lens changing.Ideal for triathletes and runners, and weighing only 29g, the Brixen is the one of the lightest shield lens interchangeable models in the Tifosi range.The black / white Slice comes equipped comes equipped with Tifosi's most versatile Fototec Light Night photochromatic lens, with a Light Transmission range from 27.7% ( fairly dark ) - 75.9% ( virtually clear ) . Light Night is colour-neutral for zero colour distortion.Tifosi's Fototec lenses adjust rapidly to changing light conditions, utilising variable tint technology. Whatever the light condition, Fototec lenses enhance your performance and increase your comfort by supplying superior clarity and protection.Includes a zipped hardshell case and a microfibre cleaning pouch. Hydrophilic rubber ear and nose pieces for a no-slip fitAdjustable nose and arm piecesFrameless design increase air circulation & reduce foggingFits S-M face size29 grams100% protection from harmful UVA/UVB raysLifetime Warranty against manufacturer defects*Compatible with the RX03A optical adapter